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Modified dust-collecting powder, as well as preparation method and application thereof

A dust powder and modification technology, which is applied in the field of modified dust collection powder and its preparation, to achieve the effects of reducing dosage, improving economic value, and satisfying coupling and filling effects

Inactive Publication Date: 2019-03-26
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, so far, there is no information on the surface chemical modification of dust collection powder and its application in filling rubber products.

Method used

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  • Modified dust-collecting powder, as well as preparation method and application thereof
  • Modified dust-collecting powder, as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] Inject the 800 mesh (15 micron) fine particle dust collection powder into the closed kneader through the pipeline, start stirring, and at the same time spray the modifier mist directly on the surface of the fine particle dust collection powder from the metering nozzle installed on the top of the kneader Dispersion (10 kg of silane coupling agent and titanate coupling agent, 10 kg of neutralizing agent, and 5 kg of solvent oil and epoxidized soybean oil per ton of dust collection powder), and in a kneader Heating and kneading at 80°C for 30 minutes, cooling and packaging to obtain fine particle modified dust collection powder, which can be used as a plastic filler product.

Embodiment 2

[0053] Inject the 3000 mesh (4 micron) superfine particle dust collection powder into the closed kneader through the pipeline, start stirring, and at the same time spray the modifier directly on the surface of the ultrafine particle dust collection powder from the metering nozzle installed on the top of the kneader Spray dispersion (15 kg of titanate coupling agent and aluminate coupling agent, 15 kg of neutralizing agent, 8 kg of alcohol, triethanolamine and allyloxypropylene oxide per ton of dust collection powder Mixed solution), heated and kneaded at 80°C in a kneader for 30 minutes, cooled and packaged to obtain ultrafine particle modified dust collection powder, which can be used as a medium-to-high-grade rubber filler product.

Embodiment 3

[0055] Inject 3500 mesh (3.5 micron) ultra-fine dust collection powder into the closed kneader through the pipeline, start stirring, and at the same time spray the modifier directly on the surface of the ultra-fine dust collection powder from the metering nozzle installed on the top of the kneader Spray dispersion (a mixture of 20 kg of zirconate coupling agent and aluminate coupling agent, 20 kg of neutralizing agent, 12 kg of alcohol and glycidyl ether per ton of dust collection powder), and kneading Heating and kneading at 80°C in the machine for 30 minutes, cooling and packaging to obtain ultra-fine particle modified dust collection powder, the surface of which is completely covered by the modifier and has a semi-reinforcing effect. It can be used as a high-quality rubber filler product and Special filler for coatings.

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Abstract

The invention discloses a method for preparing modified dust-collecting powder. According to the preparation method, the modified dust-collecting powder is prepared by performing surface chemical coupling and neutral modifying treatment on dust-collecting powder raw materials with a chemical modifier consisting of coupler, neutralizer and the like; one or more organic groups with saturated or unsaturated structure is chemically bonded to the particle surface, the hydrophobicity of the particle surface is improved (activation index is more than 0.95), the binding force between modified dust-collecting powder particles and rubber matrix can be reinforced, and the strong basicity (pH is 10) of the dust-collecting powder is neutralized, so that the dust-collecting powder is neutral dust-collecting powder having pH of 7-8. The method has the advantages of energy conservation, environmental friendliness, high utilization degree (more than 90 percent) of dust-collecting powder, wide particlefineness selection range (more than 400-3000 meshes, or 37-4 microns or lower) of raw material dust-collecting powder, small coupler usage (1-2 percent), uniform distribution and the like; and the modified dust-collecting powder has good compatibility with rubber matrix, can completely replace calcium carbonate and partially replace talc powder or carbon black in rubber product filling, and is a resource regenerable material with low cost and good quality.

Description

technical field [0001] The invention belongs to the technical field of filler processing for rubber products, and relates to a modified dust-collecting powder and a preparation method and application thereof. Background technique [0002] Dust collection powder is a solid waste discharged from bauxite calcination in the aluminum processing industry. It is a dispersed system composed of particles with different compositions, structures and shapes. The main chemical components of dust collection powder are aluminum (45.39%), silicon (35.99%), potassium (11.94%) oxides, a certain amount of iron (1.35%), titanium (1.22%), magnesium (0.84%), sodium (0.42%), calcium (0.39%) oxides. my country's aluminum processing industry emits a huge amount of dust collection powder. In Luoyang, Henan alone, the annual dust collection powder produced by bauxite calcination exceeds 150,000 tons, which is completely unused. At present, the basic treatment method for dust collection powder in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08K9/04C08K9/06C08K11/00C08L23/28C08L91/06C08L91/00
CPCC08K9/04C08K9/06C08K9/08C08K11/005C08K2201/003C08L23/286C08L2205/02C08L2205/03C08L91/06C08L91/00C08K13/06
Inventor 谢美然韩会景张衡臣毕馨文马仁旺宫军田莉
Owner EAST CHINA NORMAL UNIV
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